WordPress security changelog
MEDIUM CVE-2026-15827 Deferred

GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor: A security weakness

GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor is affected by a security weakness. The vulnerable path is reachable without authentication. The resulting impact depends on how the affected component exposes the vulnerable operation. The published affected range is <= 2.4.12.

CVE / CNA score 5.3 CVSS 3.1 · security@wordfence.com
NVD score Pending NVD has not published its own CVSS assessment.
Component
GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor
Plugin slug
gutenkit-blocks-addon
Affected
<= 2.4.12
Safe version
> 2.4.12
Published
Jul 23, 2026
Weakness
CWE-862 — Missing Authorization

This CVE was published Jul 23, 2026 and is one of 3 known issues for this plugin.

What to do

Update, patch or deactivate.

Update GutenKit – Page Builder Blocks, Patterns, and Templates for Gutenberg Block Editor to a release after 2.4.12, or disable and remove it until a fixed version is available.

A safe version is available, so updating to that version or later is the preferred remediation. If an immediate update is not practical, consider a targeted application patch or temporarily restricting the affected functionality.

Deactivate only when warranted by your risk profile, or when advised by your hosting provider in the limited circumstances where the vulnerability cannot otherwise be mitigated. If you’re unsure which action is appropriate, contact Fused or your hosting provider for guidance.

Source record

Technical description

The GutenKit Blocks plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the /wp-json/gutenkit/v1/mailchimp/get/lists and /wp-json/gutenkit/v1/mailchimp/get/interests REST API endpoints in versions up to, and including, 2.4.12. Both endpoints are registered with permission_callback => '__return_true', and their callbacks read the site's stored Mailchimp API key from the gutenkit_settings_list option and proxy Mailchimp audience/list, merge-field, interest-category, interest-name, and subscriber-count metadata back to the caller with no login, nonce, or capability check. This makes it possible for unauthenticated attackers to retrieve private Mailchimp audience configuration information from any site that has configured the GutenKit Mailchimp integration.

CVE / CNA vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Primary and upstream sources